Debugger error

i am not able to start my debuger.Please see the messege when i start the debuger.

Establishing a connection to the Integration Service DevEngine...
Integration Service DevEngine acknowledged its ability to debug a mapping.
Initializing debugger...
bind: (WSAEADDRINUSE)Address already in use

Establishing a connection to the Integration Service DevEngine...
Integration Service DevEngine acknowledged its ability to debug a mapping.
Initializing debugger...
Sending request to Integration Service DevEngine to debug mapping M_SEC_vs_HPI_QAvalidation...
Warning: TCP/IP shutdown not successful.
ERROR: Workflow [Siddardh:WF_sec_vs_hpi_QA_validation[version 1]]: Could not acquire the execute lock for Workflow [WF_sec_vs_hpi_QA_validation] []. Please check the Integration Service log for more information.
Debugger startup not successful.